Question

1. $(x^2 - x - 2) + (7x^2 - x) =$

Explanation:

Step1: Remove parentheses

$x^2 - x - 2 + 7x^2 - x$

Step2: Combine like $x^2$ terms

$x^2 + 7x^2 - x - x - 2 = 8x^2 - x - x - 2$

Step3: Combine like $x$ terms

$8x^2 + (-x - x) - 2 = 8x^2 - 2x - 2$

Answer:

$8x^2 - 2x - 2$